WO2021248354A1 - Relocalisation optimisée de fonctions d'accès et de mobilité dans des dispositifs avec multiples modules d'identité d'abonné - Google Patents

Relocalisation optimisée de fonctions d'accès et de mobilité dans des dispositifs avec multiples modules d'identité d'abonné Download PDF

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Publication number
WO2021248354A1
WO2021248354A1 PCT/CN2020/095318 CN2020095318W WO2021248354A1 WO 2021248354 A1 WO2021248354 A1 WO 2021248354A1 CN 2020095318 W CN2020095318 W CN 2020095318W WO 2021248354 A1 WO2021248354 A1 WO 2021248354A1
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WIPO (PCT)
Prior art keywords
sim
amf
nssai
nssai list
allowed nssai
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PCT/CN2020/095318
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English (en)
Inventor
Chaofeng HUI
Fojian ZHANG
Yuankun ZHU
Hao Zhang
Quanling ZHANG
Yi Liu
Jian Li
Ying Wang
Meng Liu
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Qualcomm Incorporated
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Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/095318 priority Critical patent/WO2021248354A1/fr
Publication of WO2021248354A1 publication Critical patent/WO2021248354A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/005—Multiple registrations, e.g. multihoming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183—Processing at user equipment or user record carrier

Definitions

  • Various aspects described herein generally relate to wireless communication systems, and more particularly, to optimized access and mobility function (AMF) relocation in devices, e.g., user equipments, with multiple subscriber identity modules (SIMs) .
  • AMF optimized access and mobility function
  • SIMs subscriber identity modules
  • Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G) , a second-generation (2G) digital wireless phone service (including interim 2.5G and 2.75G networks) , a third-generation (3G) high speed data, Internet-capable wireless service and a fourth-generation (4G) service (e.g., Long-Term Evolution (LTE) or WiMax) .
  • 1G first-generation analog wireless phone service
  • 2G second-generation
  • 3G third-generation
  • 4G fourth-generation
  • LTE Long-Term Evolution
  • WiMax Worldwide Interoperability for Mobile communications
  • PCS Personal Communications Service
  • Examples of known cellular systems include the cellular Analog Advanced Mobile Phone System (AMPS) , and digital cellular systems based on Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , the Global System for Mobile access (GSM) variation of TDMA, etc.
  • AMPS cellular Analog Advanced Mobile Phone System
  • CDMA Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • GSM Global System for Mobile access
  • a fifth generation (5G) mobile standard calls for higher data transfer speeds, greater numbers of connections, and better coverage, among other improvements.
  • the 5G standard according to the Next Generation Mobile Networks Alliance, is designed to provide data rates of several tens of megabits per second to each of tens of thousands of users, with 1 gigabit per second to tens of workers on an office floor. Several hundreds of thousands of simultaneous connections should be supported in order to support large sensor deployments. Consequently, the spectral efficiency of 5G mobile communications should be significantly enhanced compared to the current 4G standard. Furthermore, signaling efficiencies should be enhanced and latency should be substantially reduced compared to current standards.
  • NR connectivity or simply NR connectivity, has gained significant commercial traction in recent time.
  • UI user interface
  • UE user equipment
  • the UE may comprise a processor, a memory, and a transceiver.
  • the processor, the memory, and/or the transceiver may be configured to establish a first protocol data unit (PDU) session between the first SIM and a first access and mobility function (AMF) of a network.
  • the first PDU session maybe established based on first single network slice selection assistance information (S-NSSAI) included in a first allowed NSSAI list.
  • S-NSSAI single network slice selection assistance information
  • the first allowed NSSAI list may be associated with the first SIM.
  • the processor, the memory, and/or the transceiver may also be configured to receive a configuration update command from the first AMF for updating the first allowed NSSAI list.
  • the configuration update command may be received subsequent to establishing the first PDU session.
  • a new allowed NSSAI list may be provided in the configuration update command.
  • the new allowed NSSAI list may include a second S-NSSAI.
  • the processor, the memory, and/or the transceiver may further be configured to update a second allowed NSSAI list associated with the second SIM based on the received configuration update command.
  • the second allowed NSSAI list may be updated subsequent to receiving the configuration update command from the first AMF.
  • the updated second allowed NSSAI list may include the second S-NSSAI.
  • the processor, the memory, and/or the transceiver may yet be configured to establish a second PDU session between the second SIM and a second AMF of the network.
  • the second PDU session may be established subsequent to updating the second allowed NSSAI list, and may be established based on the second S-NSSAI included in the updated second allowed NSSAI list.
  • the method may comprise establishing a first protocol data unit (PDU) session between the first SIM and a first access and mobility function (AMF) of a network.
  • the first PDU session maybe established based on first single network slice selection assistance information (S-NSSAI) included in a first allowed NSSAI list.
  • S-NSSAI single network slice selection assistance information
  • the first allowed NSSAI list may be associated with the first SIM.
  • the method may also comprise receiving a configuration update command from the first AMF for updating the first allowed NSSAI list.
  • the configuration update command may be received subsequent to establishing the first PDU session.
  • a new allowed NSSAI list may be provided in the configuration update command.
  • the new allowed NSSAI list may include a second S-NSSAI.
  • the method may further comprise updating a second allowed NSSAI list associated with the second SIM based on the received configuration update command.
  • the second allowed NSSAI list may be updated subsequent to receiving the configuration update command from the first AMF.
  • the updated second allowed NSSAI list may include the second S-NSSAI.
  • the method may yet comprise establishing a second PDU session between the second SIM and a second AMF of the network.
  • the second PDU session may be established subsequent to updating the second allowed NSSAI list, and may be established based on the second S-NSSAI included in the updated second allowed NSSAI list.
  • the UE may comprise means for establishing a first protocol data unit (PDU) session between the first SIM and a first access and mobility function (AMF) of a network.
  • the first PDU session maybe established based on first single network slice selection assistance information (S-NSSAI) included in a first allowed NSSAI list.
  • S-NSSAI single network slice selection assistance information
  • the first allowed NSSAI list may be associated with the first SIM.
  • the UE may also comprise means for receiving a configuration update command from the first AMF for updating the first allowed NSSAI list.
  • the configuration update command may be received subsequent to establishing the first PDU session.
  • a new allowed NSSAI list may be provided in the configuration update command.
  • the new allowed NSSAI list may include a second S-NSSAI.
  • the UE may further comprise means for updating a second allowed NSSAI list associated with the second SIM based on the received configuration update command.
  • the second allowed NSSAI list may be updated subsequent to receiving the configuration update command from the first AMF.
  • the updated second allowed NSSAI list may include the second S-NSSAI.
  • the UE may yet comprise means for establishing a second PDU session between the second SIM and a second AMF of the network.
  • the second PDU session may be established subsequent to updating the second allowed NSSAI list, and may be established based on the second S-NSSAI included in the updated second allowed NSSAI list.
  • a non-transitory computer-readable medium storing computer-executable instructions for a user equipment (UE) configured with first and second subscriber identity modules (SIMs) is disclosed.
  • the executable instructions may comprise one or more instructions instructing the UE to establish a first protocol data unit (PDU) session between the first SIM and a first access and mobility function (AMF) of a network.
  • the first PDU session maybe established based on first single network slice selection assistance information (S-NSSAI) included in a first allowed NSSAI list.
  • S-NSSAI single network slice selection assistance information
  • the first allowed NSSAI list may be associated with the first SIM.
  • the executable instructions may also comprise one or more instructions instructing the UE to receive a configuration update command from the first AMF for updating the first allowed NSSAI list.
  • the configuration update command may be received subsequent to establishing the first PDU session.
  • a new allowed NSSAI list may be provided in the configuration update command.
  • the new allowed NSSAI list may include a second S-NSSAI.
  • the executable instructions may further comprise one or more instructions instructing the UE to update a second allowed NSSAI list associated with the second SIM based on the received configuration update command.
  • the second allowed NSSAI list may be updated subsequent to receiving the configuration update command from the first AMF.
  • the updated second allowed NSSAI list may include the second S-NSSAI.
  • the executable instructions may yet comprise one or more instructions instructing the UE to establish a second PDU session between the second SIM and a second AMF of the network.
  • the second PDU session may be established subsequent to updating the second allowed NSSAI list, and may be established based on the second S-NSSAI included in the updated second allowed NSSAI list.
  • FIG. 1 illustrates an exemplary wireless communications system in accordance with one or more aspects of the disclosure
  • FIG. 2 is a simplified block diagram of several sample aspects of components that may be employed in wireless communication nodes and configured to support communication in accordance with one or more aspects of the disclosure;
  • FIGs. 3A and 3B illustrate a flow of an example scenario that shows a conventional technique implemented by a user equipment to perform access and mobility function relocation;
  • FIGs. 4A and 4B illustrate a flow of an example scenario that shows a technique implemented by a user equipment with dual subscriber identity modules to optimize access and mobility function relocation in accordance with one or more aspects of the disclosure
  • FIGs. 5-6 illustrate flow charts of an exemplary method performed by a user equipment to optimize access and mobility function relocation in accordance with one or more aspects of the disclosure
  • FIG. 7 illustrates a simplified block diagram of several sample aspects of a user equipment apparatus configured to optimize access and mobility function relocation in accordance with one or more aspects of the disclosure.
  • various aspects may be described in terms of sequences of actions to be performed by, for example, elements of a computing device.
  • Those skilled in the art will recognize that various actions described herein can be performed by specific circuits (e.g., an application specific integrated circuit (ASIC) ) , by program instructions being executed by one or more processors, or by a combination of both.
  • these sequences of actions described herein can be considered to be embodied entirely within any form of non-transitory computer-readable medium having stored thereon a corresponding set of computer instructions that upon execution would cause an associated processor to perform the functionality described herein.
  • the various aspects described herein may be embodied in a number of different forms, all of which have been contemplated to be within the scope of the claimed subject matter.
  • the corresponding form of any such aspects may be described herein as, for example, “logic configured to” and/or other structural components configured to perform the described action.
  • UE user equipment
  • base station base station
  • RAT Radio Access Technology
  • UEs may be any wireless communication device (e.g., a mobile phone, router, tablet computer, laptop computer, tracking device, Internet of Things (IoT) device, etc. ) used by a user to communicate over a wireless communications network.
  • a UE may be mobile or may (e.g., at certain times) be stationary, and may communicate with a Radio Access Network (RAN) .
  • RAN Radio Access Network
  • UE may be referred to interchangeably as an “access terminal” or “AT, ” a “client device, ” a “wireless device, ” a “subscriber device, ” a “subscriber terminal, ” a “subscriber station, ” a “user terminal” or UT, a “mobile terminal, ” a “mobile station, ” or variations thereof.
  • AT access terminal
  • client device a “client device
  • wireless device a “subscriber device, ” a “subscriber terminal, ” a “subscriber station, ” a “user terminal” or UT
  • UEs can communicate with a core network via a RAN, and through the core network the UEs can be connected with external networks such as the Internet and with other UEs.
  • WiFi networks e.g., based on Institute of Electrical and Electronics Engineers (IEEE) 802.11, etc.
  • IEEE Institute of Electrical and Electronics Engineers
  • a base station may operate according to one of several RATs in communication with UEs depending on the network in which it is deployed, and may be alternatively referred to as an Access Point (AP) , a Network Node, a NodeB, an evolved NodeB (eNB) , a general Node B (gNodeB, gNB) , etc.
  • AP Access Point
  • eNB evolved NodeB
  • gNodeB gNodeB, gNB
  • a base station may provide edge node signaling functions while in other systems it may provide additional control and/or network management functions.
  • UEs can be embodied by any of a number of types of devices including but not limited to printed circuit (PC) cards, compact flash devices, external or internal modems, wireless or wireline phones, smartphones, tablets, tracking devices, asset tags, and so on.
  • a communication link through which UEs can send signals to a RAN is called an uplink channel (e.g., a reverse traffic channel, a reverse control channel, an access channel, etc. ) .
  • a communication link through which the RAN can send signals to UEs is called a downlink or forward link channel (e.g., a paging channel, a control channel, a broadcast channel, a forward traffic channel, etc. ) .
  • traffic channel can refer to either an uplink /reverse or downlink /forward traffic channel.
  • FIG. 1 illustrates an exemplary wireless communications system 100 according to one or more aspects.
  • the wireless communications system 100 which may also be referred to as a wireless wide area network (WWAN) , may include various base stations 102 and various UEs 104.
  • the base stations 102 may include macro cells (high power cellular base stations) and/or small cells (low power cellular base stations) .
  • the macro cells may include Evolved NodeBs (eNBs) where the wireless communications system 100 corresponds to an Long-Term Evolution (LTE) network, gNodeBs (gNBs) where the wireless communications system 100 corresponds to a 5G network, and/or a combination thereof, and the small cells may include femtocells, picocells, microcells, etc.
  • LTE Long-Term Evolution
  • gNodeBs gNodeBs
  • the base stations 102 may collectively form a Radio Access Network (RAN) and interface with an Evolved Packet Core (EPC) or Next Generation Core (NGC) through backhaul links.
  • EPC Evolved Packet Core
  • NRC Next Generation Core
  • the base stations 102 may perform functions that relate to one or more of transferring user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, RAN sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages.
  • the base stations 102 may communicate with each other directly or indirectly (e.g., through the EPC /NGC) over backhaul links 134, which may be wired or wireless.
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. In an aspect, although not shown in FIG. 1, coverage areas 110 may be subdivided into a plurality of cells (e.g., three) , or sectors, each cell corresponding to a single antenna or array of antennas of a base station 102. As used herein, the term “cell” or “sector” may correspond to one of a plurality of cells of a base station 102, or to the base station 102 itself, depending on the context.
  • While neighbor macro cell geographic coverage areas 110 may partially overlap (e.g., in a handover region) , some of the geographic coverage areas 110 may be substantially overlapped by a larger geographic coverage area 110.
  • a small cell base station 102' may have a coverage area 110' that substantially overlaps with the coverage area 110 of one or more macro cell base stations 102.
  • a network that includes both small cell and macro cells may be known as a heterogeneous network.
  • a heterogeneous network may also include Home eNBs (HeNBs) and/or Home gNodeBs, which may provide service to a restricted group known as a closed subscriber group (CSG) .
  • HeNBs Home eNBs
  • CSG closed subscriber group
  • the communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • the communication links 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • MIMO multiple input multiple output
  • the communication links may be through one or more carriers. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or less carriers may be allocated for DL than for UL) .
  • the wireless communications system 100 may further include a wireless local area network (WLAN) access point (AP) 150 in communication with WLAN stations (STAs) 152 via communication links 154 in an unlicensed frequency spectrum (e.g., 5 GHz) .
  • WLAN wireless local area network
  • AP access point
  • the WLAN STAs 152 and/or the WLAN AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell base station 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell base station 102' may employ LTE or 5G technology and use the same 5 GHz unlicensed frequency spectrum as used by the WLAN AP 150. The small cell base station 102', employing LTE /5G in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network. LTE in an unlicensed spectrum may be referred to as LTE-unlicensed (LTE-U) , licensed assisted access (LAA) , or MulteFire.
  • LTE-U LTE-unlicensed
  • LAA licensed assisted access
  • MulteFire MulteFire
  • the wireless communications system 100 may further include a mmW base station 180 that may operate in mmW frequencies and/or near mmW frequencies in communication with a UE 182.
  • Extremely high frequency (EHF) is part of the radio frequency (RF) range in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in this band may be referred to as a millimeter wave.
  • Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave.
  • the mmW base station 180 may utilize beamforming 184 with the UE 182 to compensate for the extremely high path loss and short range. Further, it will be appreciated that in alternative configurations, one or more base stations 102 may also transmit using mmW or near mmW and beamforming. Accordingly, it will be appreciated that the foregoing illustrations are merely examples and should not be construed to limit the various aspects disclosed herein.
  • the wireless communications system 100 may further include one or more UEs, such as UE 190, that connects indirectly to one or more communication networks via one or more device-to-device (D2D) peer-to-peer (P2P) links.
  • D2D device-to-device
  • P2P peer-to-peer
  • UE 190 has a D2D P2P link 192 with one of the UEs 104 connected to one of the base stations 102 (e.g., through which UE 190 may indirectly obtain cellular connectivity) and a D2D P2P link 194 with WLAN STA 152 connected to the WLAN AP 150 (through which UE 190 may indirectly obtain WLAN-based Internet connectivity) .
  • the D2D P2P links 192-194 may be supported with any well-known D2D radio access technology (RAT) , such as LTE Direct (LTE-D) , WiFi Direct (WiFi-D) , Bluetooth, and so on.
  • RAT D2D radio access technology
  • Any of the base stations 102, 102’ , 180 may send measurement requests (e.g., measurement control order (MCO) ) to the UEs 104, 182, 190, and the UE’s 104, 182, 190 may respond with measurement reports accordingly.
  • MCO measurement control order
  • FIG. 2 illustrates several sample components (represented by corresponding blocks) that may be incorporated into an apparatus 202 and an apparatus 204 (corresponding to, for example, a UE and a base station (e.g., eNB, gNB) , respectively, to support the operations as disclosed herein.
  • the apparatus 202 may correspond to a UE
  • the apparatus 204 may correspond to a network node such as a gNB and/or an eNB.
  • the components may be implemented in different types of apparatuses in different implementations (e.g., in an ASIC, in a System-on-Chip (SoC) , etc. ) .
  • the illustrated components may also be incorporated into other apparatuses in a communication system.
  • apparatuses in a system may include components similar to those described to provide similar functionality.
  • a given apparatus may contain one or more of the components.
  • an apparatus may include multiple transceiver components that enable the apparatus to operate on multiple carriers and/or communicate via different technologies.
  • the apparatus 202 and the apparatus 204 each may include at least one wireless communication device (represented by the communication devices 208 and 214) for communicating with other nodes via at least one designated RAT (e.g., LTE, New Radio (NR) ) .
  • Each communication device 208 may include at least one transmitter (represented by the transmitter 210) for transmitting and encoding signals (e.g., messages, indications, information, and so on) and at least one receiver (represented by the receiver 212) for receiving and decoding signals (e.g., messages, indications, information, pilots, and so on) .
  • Each communication device 214 may include at least one transmitter (represented by the transmitter 216) for transmitting signals (e.g., messages, indications, information, pilots, and so on) and at least one receiver (represented by the receiver 218) for receiving signals (e.g., messages, indications, information, and so on) .
  • signals e.g., messages, indications, information, pilots, and so on
  • receiver 2148 for receiving signals (e.g., messages, indications, information, and so on) .
  • a transmitter and a receiver may comprise an integrated device (e.g., embodied as a transmitter circuit and a receiver circuit of a single communication device) in some implementations, may comprise a separate transmitter device and a separate receiver device in some implementations, or may be embodied in other ways in other implementations.
  • a transmitter may include a plurality of antennas, such as an antenna array, that permits the respective apparatus to perform transmit “beamforming, ” as described further herein.
  • a receiver may include a plurality of antennas, such as an antenna array, that permits the respective apparatus to perform receive beamforming, as described further herein.
  • the transmitter and receiver may share the same plurality of antennas, such that the respective apparatus can only receive or transmit at a given time, not both at the same time.
  • a wireless communication device (e.g., one of multiple wireless communication devices) of the apparatus 204 may also comprise a Network Listen Module (NLM) or the like for performing various measurements.
  • NLM Network Listen Module
  • the apparatus 204 may include at least one communication device (represented by the communication device 220) for communicating with other nodes.
  • the communication device 220 may comprise a network interface (e.g., one or more network access ports) configured to communicate with one or more network entities via a wire-based or wireless backhaul connection.
  • the communication device 220 may be implemented as a transceiver configured to support wire-based or wireless signal communication. This communication may involve, for example, sending and receiving messages, parameters, or other types of information.
  • the communication device 220 is shown as comprising a transmitter 222 and a receiver 224 (e.g., network access ports for transmitting and receiving) .
  • the apparatuses 202 and 204 may also include other components used in conjunction with the operations as disclosed herein.
  • the apparatus 202 may include a processing system 232 for providing functionality relating to, for example, communication with the network.
  • the apparatus 204 may include a processing system 234 for providing functionality relating to, for example, communication with the UEs.
  • the processing systems 232 and 234 may include, for example, one or more general purpose processors, multi-core processors, ASICs, digital signal processors (DSPs) , field programmable gate arrays (FPGA) , or other programmable logic devices or processing circuitry.
  • the apparatus 202 may include first and second subscriber identify modules (SIMs) 252 and 256 that may be associated with providing services in radio access technologies (e.g., 4G LTE, 5G NR) .
  • SIMs subscriber identify modules
  • the apparatuses 202 and 204 may include memory components 238 and 240 (e.g., each including a memory device) , respectively, for maintaining information (e.g., information indicative of reserved resources, thresholds, parameters, and so on) .
  • memory 238 can comprise a computer-readable medium storing one or more computer-executable instructions for a user equipment (UE) where the one or more instructions instruct apparatus 202 (e.g., processing system 232 in combination with communications device 208 and/or other aspects of apparatus 202) to perform any of the functions of FIGs. 5 and 6.
  • UE user equipment
  • the apparatuses 202 and 204 may include user interface devices 244 and 246, respectively, for providing indications (e.g., audible and/or visual indications) to a user and/or for receiving user input (e.g., upon user actuation of a sensing device such a keypad, a touch screen, a microphone, and so on) .
  • indications e.g., audible and/or visual indications
  • user input e.g., upon user actuation of a sensing device such a keypad, a touch screen, a microphone, and so on.
  • the apparatuses 202 and 204 are shown in FIG. 2 as including various components that may be configured according to the various examples described herein. It will be appreciated, however, that the illustrated blocks may have different functionality in different designs.
  • the components of FIG. 2 may be implemented in various ways.
  • the components of FIG. 2 may be implemented in one or more circuits such as, for example, one or more processors and/or one or more ASICs (which may include one or more processors) .
  • each circuit may use and/or incorporate at least one memory component for storing information or executable code used by the circuit to provide this functionality.
  • some or all of the functionality represented by blocks 208, 232, 238, and 244 may be implemented by processor and memory component (s) of the apparatus 202 (e.g., by execution of appropriate code and/or by appropriate configuration of processor components) .
  • some or all of the functionality represented by blocks 214, 220, 234, 240, and 246 may be implemented by processor and memory component (s) of the apparatus 204 (e.g., by execution of appropriate code and/or by appropriate configuration of processor components) .
  • the apparatus 204 may correspond to a “small cell” or a Home gNodeB.
  • the apparatus 202 may transmit and receive messages via a wireless link 260 with the apparatus 204, the messages including information related to various types of communication (e.g., voice, data, multimedia services, associated control signaling, etc. ) .
  • the wireless link 260 may operate over a communication medium of interest, shown by way of example in FIG. 2 as the medium 262, which may be shared with other communications as well as other RATs.
  • a medium of this type may be composed of one or more frequency, time, and/or space communication resources (e.g., encompassing one or more channels across one or more carriers) associated with communication between one or more transmitter /receiver pairs, such as the apparatus 204 and the apparatus 202 for the medium 262.
  • space communication resources e.g., encompassing one or more channels across one or more carriers
  • the apparatus 202 and the apparatus 204 may operate via the wireless link 260 according to one or more radio access types, such as LTE, LTE-U, or NR, depending on the network in which they are deployed.
  • These networks may include, for example, different variants of CDMA networks (e.g., LTE networks, NR networks, etc. ) , TDMA networks, FDMA networks, Orthogonal FDMA (OFDMA) networks, Single-Carrier FDMA (SC-FDMA) networks, and so on.
  • a UE may be capable of operating in multiple radio access technologies (RATs) .
  • RATs radio access technologies
  • a UE may be capable of operating in a first RAT (e.g., LTE) and in a second RAT (e.g., NR) .
  • first and second RATs may be any of the RATs currently known (e.g., WiMax, CDMA, WCDMA, UTRA, Evolved Universal Terrestrial Radio Access (E-UTRA) , GSM, FDMA, GSM, TDMA, etc. ) .
  • a UE may be may be capable of operating in multiple RATs at the same time.
  • a UE that can operate in both LTE and NR simultaneously is an E-UTRA-NR Dual Connectivity (ENDC) capable UE.
  • ENDC is an example of Multi-RAT DC (MRDC) capability.
  • MRDC Multi-RAT DC
  • eNB base station
  • gNB base station
  • NR second RAT
  • the UE When the UE operates in the first RAT, it may communicate with a network node (e.g., base station, gNB, etc. ) of the first RAT. Similarly, when the UE operates in the second RAT, it may communicate with a network node (e.g., base station, eNB, etc. ) of the second RAT.
  • a network node e.g., base station, gNB, etc.
  • the UE may be capable of operating in a standalone (SA) or in a non-standalone (NSA) mode within a given RAT.
  • SA standalone
  • NSA non-standalone
  • the UE When operating in the SA mode, the UE is able to exchange both control and data plane (also referred to as user plane) information with the network node and/or the core network of the given RAT (e.g., NR) .
  • control and data plane also referred to as user plane
  • the UE is communicating with network nodes of the first and second RATs.
  • the UE can exchange data plane information with the network nodes of both the first RAT (e.g., LTE) and the second RAT (e.g., NR) .
  • the control plane information is exchanged only with the network node of the first RAT (e.g., LTE) .
  • FIG. 3A illustrates a flow 300 of an example scenario that shows a conventional technique implemented by a user equipment (UE) to perform access and mobility function (AMF) relocation, i.e., from AMF1 to AMF2.
  • FIG. 3B illustrates states of an example of a UE route selection policy (URSP) structure before and after the AMF relocation, i.e., before and after configuration update.
  • URSP UE route selection policy
  • the UE in standalone initially registers and establishes a protocol data unit (PDU) session with the network according the URSP of the SIM, in particular according to the URSP of the SIM.
  • PDU protocol data unit
  • a network slice selection assistance information is associated with a network slice, which may be viewed as a logical or virtual network customized to serve a defined business purpose or customer.
  • SIM is assumed to have a preconfigured NSSAI list that comprises one or more single NSSAIs (S-NSSAI) including S-NSSAI-A.
  • SIM registers with AMF1, e.g., by providing the preconfigured NSSAI list to AMF1 and receiving back allowed NSSAI list that also includes S-NSSAI-A.
  • AMF1 supports enhanced mobile broadband (eMBB) type of service.
  • PDU protocol data unit
  • SIM sends a PDU Session Establishment Request to AMF1.
  • S-NSSAI-A is included in the PDU Session Establishment Request.
  • AMF1 sends PDU Session Establishment Accept back to SIM thus establishing the PDU session.
  • SIM can then receive data services, eMBB services in this instance, through the established PDU session with AMF1.
  • AMF1 triggers a Generic UE configuration update procedure to SIM to update with new allowed NSSAI list that contains S-NSSAI-B.
  • One reason for triggering the update procedure is that an application may be activated in the UE that calls for a service that AMF1 is unable to provide.
  • an application that requires a PDU session configured to support ultra-reliable low-latency communication (URLLC) type of service may be activated in the UE.
  • URLLC ultra-reliable low-latency communication
  • AMF1 can send CONFIGURATION UPDATE COMMAND as seen in FIG. 3A.
  • the CONFIGURATION UPDATE COMMAND includes a new allowed NSSAI list, which identifies one or more NSSAIs that can provide the necessary type of service including S-NSSAI-B.
  • SIM Upon receipt of the CONFIGURATION UPDATE COMMAND, SIM updates its URSP policy structure with the received new allowed NSSAI list (see state after update in FIG. 3B) , and sends CONFIGURATION UPDATE COMPLETE back to the network. Thereafter, SIM registers with AMF2, which supports the URLLC type of service. As a result, AMF relocation is performed.
  • AMF indicates "registration requested" in the configuration update indication information element (IE) and includes the allowed NSSAI IE in the CONFIGURATION UPDATE COMMAND message.
  • IE configuration update indication information element
  • FIGs. 4A and 4B illustrate a flow 400 of an example scenario that shows a proposed technique implemented by a UE with dual SIMs to optimize access and mobility function relocation in accordance with one or more aspects of the disclosure. While dual SIMs are illustrated, the concepts illustrated can be readily applied to more than two SIMs. For simplicity, it may be assumed that the two SIMs –SIM1 and SIM2 –belong to a same operator. It may also be assumed that SIM1 and SIM2 have similar preconfigured NSSAI list (e.g., includes S-NSSAI-A but does not include S-NSSAI-B) . Indeed, in an aspect, both preconfigured NSSAI lists may be the same.
  • preconfigured NSSAI list may be the same.
  • FIGs. 4A and 4B may be generalized as follows.
  • the update of the allowed NSSAI list for SIM1 may be much like how the allowed NSSAI list of SIM in flow 300 illustrated in FIGs. 3A and 3B is updated. That is, as seen in FIG. 4A, SIM1 may register with AMF1 using its requested NSSAI that includes S-NSSAI-A. Then AFM1 may trigger a generic UE configuration update procedure to SIM1 to update the NSSAI list associated with SIM1 with new allowed NSSAI list that includes S-NSSAI-B.
  • SIM2 its NSSAI list may be updated quickly and without signaling the network.
  • SIM1 may share its updated configuration with SIM2, and SIM2 may update its NSSAI list with the shared new allowed NSSAI list. That is, the NSSAI list of SIM2 may be updated to include S-NSSAI-B.
  • SIM2 then can register and establish a PDU session with AMF2 without exchanging signals with AMF1.
  • SIM1 may register with AMF1 using requested S-NSSAI-A contained in its preconfigured NSSAI list. Based on the initial URSP seen in FIG. 4B, when SIM1 registers with AMF1, this implies that AMF1 supports enhanced mobile broadband (eMBB) type of service.
  • SIM1 may initiate the registration process by sending a Registration Request message, which includes a requested NSSAI list, to AMF1. In this instance, SIM1 may provide its preconfigured NSSAI list as the requested NSSAI list in the Registration Request message.
  • eMBB enhanced mobile broadband
  • the SIM1 may then receive a Registration Accept message from AMF1.
  • the Registration Accept message may include an allowed NSSAI list, which may be associated with SIM1. That is, the allowed NSSAI list may comprise one or more S-NSSAIs usable by SIM1 to establish a PDU session with AMF1. S-NSSAI-A may be included among the S-NSSAIs of the allowed NSSAI list associated with SIM1.
  • SIM1 may receive PDU Session Establishment Accept message from AMF1, which indicates that the PDU session is established.
  • SIM1 may then receive data services, e.g., eMBB services, through the established PDU session with AMF1.
  • data services e.g., eMBB services
  • AMF1 may trigger a Generic UE configuration update procedure to SIM1 to update its allowed NSSAI list with new allowed NSSAI list that contains S-NSSAI-B. Again, the configuration update may be triggered because AMF1 is unable to provide a requested service, such as URLLC.
  • AMF1 may send the CONFIGURATION UPDATE COMMAND with the new allowed NSSAI list to trigger the update.
  • SIM1 may updates its allowed NSSAI list, e.g., its URSP policy structure, with the new allowed NSSAI list (see SIM1 state after update in FIG. 4B) . Then SIM1 may send CONFIGURATION UPDATE COMPLETE back to the network.
  • SIM1 may register with AMF2 which supports URLLC type of service, this time with the updated allowed NSSAI list that includes S-NSSAI-B as the requested NSSAI list in the Registration Request message.
  • AMF relocation may be performed for SIM1.
  • SIM1 then may share its updated configuration with other SIMs including SIM2, and SIM2 may update its NSSAI list.
  • SIM2 may update its NSSAI list.
  • SIM2’s URSP policy structure is updated.
  • SIM2 may then register with AMF2.
  • SIM2 may then establish the PDU session with AMF2, e.g., to receive URLLC services from the network.
  • FIG. 5 illustrates a flow chart of an exemplary method 500 performed by a UE with multiple SIMs to optimize AMF relocation.
  • FIG. 5 may be viewed as a generalization of the flow of FIG. 4.
  • the UE such as the UE 202 may be capable of operating in a radio access technology (RAT) such as LTE or NR.
  • RAT radio access technology
  • the memory component 238 may be viewed as an example of a non-transitory computer-readable medium that stores computer-executable instructions to operate components of the UE 202 such as the transceiver 208 (including transmitter 210 and receiver 212) , the processing system 232 (including one or more processors) , memory component 238, etc.
  • the UE is configured with at least two SIMs –first and second SIMs.
  • the SIMs may belong to a same operator. It may also be assumed that the UE operates in a standalone (SA) mode.
  • SA standalone
  • the UE may register the first SIM with a first AMF of a network based on a first requested NSSAI list.
  • the first requested NSSAI list which may be associated with the first SIM, may comprise one or more S-NSSAIs including a first S-NSSAI.
  • SIM1 may correspond to the first SIM
  • AMF1 may correspond to the first AMF
  • initial URSP policy structure for SIM1 may correspond with the first requested NSSAI list
  • S-NSSAI-A may correspond with the first NSSAI.
  • Means for performing block 510 may include the processing system 232, the memory component 238, the transceiver 208 and/or the first SIM 252 of the UE 202.
  • the first SIM may send a registration request to the first AMF.
  • the first requested NSSAI list may be included in the registration request.
  • the first requested NSSAI list may be a first preconfigured NSSAI list.
  • the first SIM may then receive a registration accept from the first AMF.
  • a first allowed NSSAI list may be included in the registration accept.
  • the first allowed NSSAI list may also be associated with the first SIM. That is, the first allowed NSSAI list may comprise one or more S-NSSAIs, including the first S-NSSAI, usable by the first SIM to establish a PDU session with the first AMF.
  • SIM may provide a requested NSSAI list comprising one or more S-NSSAIs to the AMF in a registration request.
  • the AMF may include in the allowed NSSAI list, only those S-NSSAIs of the requested NSSAI list the AMF allows.
  • the first allowed NSSAI list can be a subset of the first requested NSSAI list. That is, all S-NSSAIs included in the first allowed NSSAI list may also be included in the first requested NSSAI list. Similar logic may be applied to blocks 550 and/or 570.
  • the UE may establish a first PDU session between the first SIM and the first AMF based on the first S-NSSAI, which may be included in the first allowed NSSAI list received from the first AMF.
  • the UE may send a PDU establishment request to the first AMF, and then receive a PDU session establishment accept from the first AMF.
  • the UE may include the first S-NSSAI (e.g., include S-NSSAI-A) in the PDU establishment request.
  • Means for performing block 520 may include the processing system 232, the memory component 238, the transceiver 208 and/or the first SIM 252 of the UE 202.
  • the UE in block 530 may receive a configuration update command from the first AMF for updating the first allowed NSSAI list. This may correspond in FIG. 4A in which SIM1 receives the CONFIGURATION UPDATE COMMAND from the first AMF.
  • a new allowed NSSAI list may be provided in the configuration update command.
  • the new allowed NSSAI list may comprise one or more S-NSSAIs, including a second S-NSSAI (e.g., S-NSSAI-B) .
  • Means for performing block 530 may include the processing system 232, the memory component 238, the transceiver 208 and/or the first SIM 252 of the UE 202.
  • the UE may update the first allowed NSSAI list based on the configuration update command received from first AMF.
  • the first allowed NSSAI list may include the second S-NSSAI. Note that prior to the update, for example when the first SIM is registered with first AMF in block 510, the first requested NSSAI list may have included the first S-NSSAI, but not the second S-NSSAI. Thus, the first allowed NSSAI list received from the first AMF (e.g., during registration) may also have included the first S-NSSAI, but not the second S-NSSAI.
  • the UE may notify the network, e.g., notify first AMF, that the configuration update for the first SIM is completed.
  • the UE may send the CONFIGURATION UPDATE COMPLETED message to the first AMF.
  • Means for performing block 540 may include the processing system 232, the memory component 238, the transceiver 208 and/or the first SIM 252 of the UE 202.
  • the UE may register the first SIM with this time with the second AMF based on the updated first allowed NSSAI list.
  • the updated first allowed NSSAI list may include the second S-NSSAI.
  • AMF2 may correspond to the second AMF
  • updated URSP policy structure for SIM1 may correspond with the updated first request NSSAI list
  • S-NSSAI-B may correspond with the second NSSAI.
  • Means for performing block 550 may include the processing system 232, the memory component 238, the transceiver 208 and/or the first SIM 252 of the UE 202.
  • the first SIM may send a registration request to the second AMF. This time, the first SIM may update the first requested NSSAI list and incorporate the updated first requested NSSAI list as the requested NSSAI list parameter in the registration request.
  • the updated first requested NSSAI list may include the updated first allowed NSSAI list. That is, the updated first requested NSSAI list may include the second NSSAI, which was not included in either the first requested NSSAI or the first allowed NSSAI prior block 510.
  • the UE may also establish a PDU session between the first SIM and the second AMF based on the second S-NSSAI (e.g., S-NSSAI-B) included in the updated first allowed NSSAI list.
  • the UE may send a PDU session establishment request in which the second S-NSSAI is included, and the second AMF may respond with a PDU session establishment accept.
  • the UE may update a second allowed NSSAI list based on the configuration update command received from first AMF.
  • the second allowed NSSAI list may be associated with the second SIM, and may comprise one or more S-NSSAIs usable for SIM2 to register and establish a second PDU session between the UE and the second AMF.
  • updated URSP policy structure for SIM2 may correspond with the updated second allowed NSSAI list.
  • Means for performing block 560 may include the processing system 232, the memory component 238, the first SIM 252 and/or the second SIM 256 of the UE 202.
  • the configuration update command sent from the first AMF was for configuration update of the allowed NSSAI list associated with the first SIM, i.e., the first allowed NSSAI list.
  • the same configuration update command, and in particular the allowed NSSAI list provided in the configuration update command may be used to update the second allowed NSSAI list.
  • the updated second allowed NSSAI list may also include the second S-NSSAI (e.g., S-NSSAI-B) .
  • FIG. 6 illustrates a flow chart of an example process that may be performed by the UE to implement block 560.
  • the UE on behalf of the first SIM, may share the new allowed NSSAI list provided in the configuration update command received from the first AMF (e.g., in block 530) .
  • Means for performing block 610 may include the processing system 232, the memory component 238 and/or the first SIM 252 of the UE 202.
  • the UE may update the second allowed NSSAI list with the new allowed NSSAI list shared by the first SIM. That is, the updated second allowed NSSAI list may comprise one or more S-NSSAI usable by SIM2 to register and establish PDU session with the second AMF.
  • Means for performing block 620 may include the processing system 232, the memory component 238 and/or the second SIM 256 of the UE 202.
  • the second allowed NSSAI list may be updated internally within the UE without signaling the network. That is, signaling to register the second SIM with the first AMF is avoided. Also, signaling for the second SIM to receive the configuration update command from the first AMF to update the second allowed NSSAI list is also avoided.
  • the UE may register the second SIM with the second AMF based on the updated second allowed NSSAI list.
  • the updated second allowed NSSAI list may include the second S-NSSAI.
  • Means for performing block 570 may include the processing system 232, the memory component 238, the transceiver 208 and or the second SIM 256 of the UE 202.
  • the second SIM may send a registration request to the second AMF.
  • the second SIM may update a second requested NSSAI list and incorporate the updated second requested NSSAI list as the requested NSSAI list parameter in the registration request.
  • the updated second requested NSSAI list may include the updated second allowed NSSAI list. That is, the updated second requested NSSAI list may include the second NSSAI, which was not included in either the second requested NSSAI or the second allowed NSSAI prior block 550.
  • the updated second requested NSSAI list may include one or more S-NSSAIs of the second preconfigured S-NSSAIs.
  • the UE may establish a second PDU session between the second SIM and the second AMF based on the second S-NSSAI included in the updated second allowed NSSAI list.
  • Means for performing block 520 may include the processing system 232, the memory component 238, the transceiver 208 and/or the first SIM 252 of the UE 202.
  • the first PDU session established in block 520 may be associated with receiving a service of a first service type
  • the second PDU session established in block 520 may be associated with receiving a service of a second service type.
  • the first and second service types may be different.
  • the service types may be any one or more of enhanced mobile broadband (eMBB) , ultra-reliable low-latency communication (URLLC) , etc.
  • FIG. 7 illustrates an example user equipment apparatus 700 represented as a series of interrelated functional modules connected by a common bus.
  • Each of the modules may be implemented in hardware or as a combination of hardware and software.
  • the modules may be implemented as any combination of the modules of the apparatus 202 of FIG. 2.
  • a module for registering the first SIM with the first AMF 710 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , a first SIM (e.g., first SIM 252) and/or a memory component (e.g., memory component 238) .
  • a module for establishing a first PDU session 720 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , a first SIM (e.g., first SIM 252) and/or a memory component (e.g., memory component 238) .
  • a module for receiving an update configuration command 730 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , a first SIM (e.g., first SIM 252) and/or a memory component (e.g., memory component 238) .
  • a module for updating the first request NSSAI list 740 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , a first SIM (e.g., first SIM 252) , a second SIM (e.g., second SIM 256) and/or a memory component (e.g., memory component 238) .
  • a module for registering the first SIM with the second AMF 750 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , a first SIM (e.g., first SIM 252) and/or a memory component (e.g., memory component 238) .
  • a module for updating the second request NSSAI list 760 may correspond at least in some aspects to a processing system (e.g., processing system 232) , a first SIM (e.g., first SIM 252) , a second SIM (e.g., second SIM 256) and/or a memory component (e.g., memory component 238) .
  • a module for registering the second SIM with the second AMF 770 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , a second SIM (e.g., second SIM 256) and/or a memory component (e.g., memory component 238) .
  • a module for establishing a second PDU session 780 may correspond at least in some aspects to a communication device (e.g., communication device 208) , a processing system (e.g., processing system 232) , a second SIM (e.g., second SIM 256) and/or a memory component (e.g., memory component 238) .
  • the functionality of the modules of FIG. 7 may be implemented in various ways consistent with the teachings herein.
  • the functionality of these modules may be implemented as one or more electrical components.
  • the functionality of these blocks may be implemented as a processing system including one or more processor components.
  • the functionality of these modules may be implemented using, for example, at least a portion of one or more integrated circuits (e.g., an ASIC) .
  • an integrated circuit may include a processor, software, other related components, or some combination thereof.
  • the functionality of different modules may be implemented, for example, as different subsets of an integrated circuit, as different subsets of a set of software modules, or a combination thereof.
  • a given subset e.g., of an integrated circuit and/or of a set of software modules
  • FIG. 7, as well as other components and functions described herein, may be implemented using any suitable means. Such means also may be implemented, at least in part, using corresponding structure as taught herein.
  • the components described above in conjunction with the “module for” components of FIG. 7 also may correspond to similarly designated “means for” functionality.
  • one or more of such means may be implemented using one or more of processor components, integrated circuits, or other suitable structure as taught herein.
  • a general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module may reside in random access memory (RAM) , flash memory, read-only memory (ROM) , erasable programmable ROM (EPROM) , electrically erasable programmable ROM (EEPROM) , registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal (e.g., UE) .
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a computer.
  • such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • Disk and disc includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

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Abstract

L'invention concerne des techniques destinées à optimiser la relocalisation de fonctions d'accès et de mobilité (AMF) dans des équipements d'utilisateurs (UE) dotés de multiples modules d'identité d'abonné (SIM). Un premier SIM de l'UE s'inscrit et établit une session d'unités de données de protocole (PDU) avec un premier SIM. Ensuite, lorsque le réseau déclenche une relocalisation d'AMF, une mise à jour de configuration est effectuée pour amener l'UE à s'inscrire de nouveau, cette fois auprès de la seconde AMF. La configuration mise à jour est partagée avec un second SIM de l'UE, ce qui permet au second SIM de s'inscrire directement auprès de la seconde AMF.
PCT/CN2020/095318 2020-06-10 2020-06-10 Relocalisation optimisée de fonctions d'accès et de mobilité dans des dispositifs avec multiples modules d'identité d'abonné WO2021248354A1 (fr)

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